Mr Potter! Mr Black!" Sirius slunk off the table and walked next to James, since McGonagall's stare compelled him too. It was hard not to squirm under that gaze. "Do you two really want to be the first students in Hogwarts history to earn detention on their first ever day of school?"

Sirius muttered, under his breath. "Sounds bloody brilliant." He was all for it. Seemed like an achievement.

"I trust you wouldn't want me to inform your parents of this kind of misbehaviour. Now, who started this?"

Stubbornly, Sirius stayed quiet. He wasn't going to admit fault, but he would never rat someone out either. He wasn't a coward. Even if he really didn't want his parents informed.